int preflag;
int short_start, long_end; /* long/short band indexes */
uint8_t scale_factors[40];
- INTFLOAT sb_hybrid[SBLIMIT * 18]; /* 576 samples */
+ DECLARE_ALIGNED(16, INTFLOAT, sb_hybrid)[SBLIMIT * 18]; /* 576 samples */
} GranuleDef;
typedef struct MPADecodeContext {
static INTFLOAT is_table[2][16];
static INTFLOAT is_table_lsf[2][2][16];
static INTFLOAT csa_table[8][4];
-static INTFLOAT mdct_win[8][36];
static int16_t division_tab3[1<<6 ];
static int16_t division_tab5[1<<8 ];
csa_table[i][3] = ca - cs;
#endif
}
-
- /* compute mdct windows */
- for (i = 0; i < 36; i++) {
- for (j = 0; j < 4; j++) {
- double d;
-
- if (j == 2 && i % 3 != 1)
- continue;
-
- d = sin(M_PI * (i + 0.5) / 36.0);
- if (j == 1) {
- if (i >= 30) d = 0;
- else if (i >= 24) d = sin(M_PI * (i - 18 + 0.5) / 12.0);
- else if (i >= 18) d = 1;
- } else if (j == 3) {
- if (i < 6) d = 0;
- else if (i < 12) d = sin(M_PI * (i - 6 + 0.5) / 12.0);
- else if (i < 18) d = 1;
- }
- //merge last stage of imdct into the window coefficients
- d *= 0.5 / cos(M_PI * (2 * i + 19) / 72);
-
- if (j == 2)
- mdct_win[j][i/3] = FIXHR((d / (1<<5)));
- else
- mdct_win[j][i ] = FIXHR((d / (1<<5)));
- }
- }
-
- /* NOTE: we do frequency inversion adter the MDCT by changing
- the sign of the right window coefs */
- for (j = 0; j < 4; j++) {
- for (i = 0; i < 36; i += 2) {
- mdct_win[j + 4][i ] = mdct_win[j][i ];
- mdct_win[j + 4][i + 1] = -mdct_win[j][i + 1];
- }
- }
}
static av_cold int decode_init(AVCodecContext * avctx)
}
#define C3 FIXHR(0.86602540378443864676/2)
-
-/* 0.5 / cos(pi*(2*i+1)/36) */
-static const INTFLOAT icos36[9] = {
- FIXR(0.50190991877167369479),
- FIXR(0.51763809020504152469), //0
- FIXR(0.55168895948124587824),
- FIXR(0.61038729438072803416),
- FIXR(0.70710678118654752439), //1
- FIXR(0.87172339781054900991),
- FIXR(1.18310079157624925896),
- FIXR(1.93185165257813657349), //2
- FIXR(5.73685662283492756461),
-};
-
-/* 0.5 / cos(pi*(2*i+1)/36) */
-static const INTFLOAT icos36h[9] = {
- FIXHR(0.50190991877167369479/2),
- FIXHR(0.51763809020504152469/2), //0
- FIXHR(0.55168895948124587824/2),
- FIXHR(0.61038729438072803416/2),
- FIXHR(0.70710678118654752439/2), //1
- FIXHR(0.87172339781054900991/2),
- FIXHR(1.18310079157624925896/4),
- FIXHR(1.93185165257813657349/4), //2
-// FIXHR(5.73685662283492756461),
-};
+#define C4 FIXHR(0.70710678118654752439/2) //0.5 / cos(pi*(9)/36)
+#define C5 FIXHR(0.51763809020504152469/2) //0.5 / cos(pi*(5)/36)
+#define C6 FIXHR(1.93185165257813657349/4) //0.5 / cos(pi*(15)/36)
/* 12 points IMDCT. We compute it "by hand" by factorizing obvious
cases. */
in3 = MULH3(in3, C3, 4);
t1 = in0 - in4;
- t2 = MULH3(in1 - in5, icos36h[4], 2);
+ t2 = MULH3(in1 - in5, C4, 2);
out[ 7] =
out[10] = t1 + t2;
in0 += SHR(in4, 1);
in4 = in0 + in2;
in5 += 2*in1;
- in1 = MULH3(in5 + in3, icos36h[1], 1);
+ in1 = MULH3(in5 + in3, C5, 1);
out[ 8] =
out[ 9] = in4 + in1;
out[ 2] =
out[ 3] = in4 - in1;
in0 -= in2;
- in5 = MULH3(in5 - in3, icos36h[7], 2);
+ in5 = MULH3(in5 - in3, C6, 2);
out[ 0] =
out[ 5] = in0 - in5;
out[ 6] =
out[11] = in0 + in5;
}
-/* cos(pi*i/18) */
-#define C1 FIXHR(0.98480775301220805936/2)
-#define C2 FIXHR(0.93969262078590838405/2)
-#define C3 FIXHR(0.86602540378443864676/2)
-#define C4 FIXHR(0.76604444311897803520/2)
-#define C5 FIXHR(0.64278760968653932632/2)
-#define C6 FIXHR(0.5/2)
-#define C7 FIXHR(0.34202014332566873304/2)
-#define C8 FIXHR(0.17364817766693034885/2)
-
-
-/* using Lee like decomposition followed by hand coded 9 points DCT */
-static void imdct36(INTFLOAT *out, INTFLOAT *buf, INTFLOAT *in, INTFLOAT *win)
-{
- int i, j;
- INTFLOAT t0, t1, t2, t3, s0, s1, s2, s3;
- INTFLOAT tmp[18], *tmp1, *in1;
-
- for (i = 17; i >= 1; i--)
- in[i] += in[i-1];
- for (i = 17; i >= 3; i -= 2)
- in[i] += in[i-2];
-
- for (j = 0; j < 2; j++) {
- tmp1 = tmp + j;
- in1 = in + j;
-
- t2 = in1[2*4] + in1[2*8] - in1[2*2];
-
- t3 = in1[2*0] + SHR(in1[2*6],1);
- t1 = in1[2*0] - in1[2*6];
- tmp1[ 6] = t1 - SHR(t2,1);
- tmp1[16] = t1 + t2;
-
- t0 = MULH3(in1[2*2] + in1[2*4] , C2, 2);
- t1 = MULH3(in1[2*4] - in1[2*8] , -2*C8, 1);
- t2 = MULH3(in1[2*2] + in1[2*8] , -C4, 2);
-
- tmp1[10] = t3 - t0 - t2;
- tmp1[ 2] = t3 + t0 + t1;
- tmp1[14] = t3 + t2 - t1;
-
- tmp1[ 4] = MULH3(in1[2*5] + in1[2*7] - in1[2*1], -C3, 2);
- t2 = MULH3(in1[2*1] + in1[2*5], C1, 2);
- t3 = MULH3(in1[2*5] - in1[2*7], -2*C7, 1);
- t0 = MULH3(in1[2*3], C3, 2);
-
- t1 = MULH3(in1[2*1] + in1[2*7], -C5, 2);
-
- tmp1[ 0] = t2 + t3 + t0;
- tmp1[12] = t2 + t1 - t0;
- tmp1[ 8] = t3 - t1 - t0;
- }
-
- i = 0;
- for (j = 0; j < 4; j++) {
- t0 = tmp[i];
- t1 = tmp[i + 2];
- s0 = t1 + t0;
- s2 = t1 - t0;
-
- t2 = tmp[i + 1];
- t3 = tmp[i + 3];
- s1 = MULH3(t3 + t2, icos36h[ j], 2);
- s3 = MULLx(t3 - t2, icos36 [8 - j], FRAC_BITS);
-
- t0 = s0 + s1;
- t1 = s0 - s1;
- out[(9 + j) * SBLIMIT] = MULH3(t1, win[ 9 + j], 1) + buf[9 + j];
- out[(8 - j) * SBLIMIT] = MULH3(t1, win[ 8 - j], 1) + buf[8 - j];
- buf[ 9 + j ] = MULH3(t0, win[18 + 9 + j], 1);
- buf[ 8 - j ] = MULH3(t0, win[18 + 8 - j], 1);
-
- t0 = s2 + s3;
- t1 = s2 - s3;
- out[(9 + 8 - j) * SBLIMIT] = MULH3(t1, win[ 9 + 8 - j], 1) + buf[9 + 8 - j];
- out[ j * SBLIMIT] = MULH3(t1, win[ j], 1) + buf[ j];
- buf[ 9 + 8 - j ] = MULH3(t0, win[18 + 9 + 8 - j], 1);
- buf[ j ] = MULH3(t0, win[18 + j], 1);
- i += 4;
- }
-
- s0 = tmp[16];
- s1 = MULH3(tmp[17], icos36h[4], 2);
- t0 = s0 + s1;
- t1 = s0 - s1;
- out[(9 + 4) * SBLIMIT] = MULH3(t1, win[ 9 + 4], 1) + buf[9 + 4];
- out[(8 - 4) * SBLIMIT] = MULH3(t1, win[ 8 - 4], 1) + buf[8 - 4];
- buf[ 9 + 4 ] = MULH3(t0, win[18 + 9 + 4], 1);
- buf[ 8 - 4 ] = MULH3(t0, win[18 + 8 - 4], 1);
-}
-
/* return the number of decoded frames */
static int mp_decode_layer1(MPADecodeContext *s)
{
static void compute_imdct(MPADecodeContext *s, GranuleDef *g,
INTFLOAT *sb_samples, INTFLOAT *mdct_buf)
{
- INTFLOAT *win, *win1, *out_ptr, *ptr, *buf, *ptr1;
+ INTFLOAT *win, *out_ptr, *ptr, *buf, *ptr1;
INTFLOAT out2[12];
int i, j, mdct_long_end, sblimit;
mdct_long_end = sblimit;
}
- buf = mdct_buf;
- ptr = g->sb_hybrid;
- for (j = 0; j < mdct_long_end; j++) {
- /* apply window & overlap with previous buffer */
- out_ptr = sb_samples + j;
- /* select window */
- if (g->switch_point && j < 2)
- win1 = mdct_win[0];
- else
- win1 = mdct_win[g->block_type];
- /* select frequency inversion */
- win = win1 + ((4 * 36) & -(j & 1));
- imdct36(out_ptr, buf, ptr, win);
- out_ptr += 18 * SBLIMIT;
- ptr += 18;
- buf += 18;
- }
+ s->mpadsp.RENAME(imdct36_blocks)(sb_samples, mdct_buf, g->sb_hybrid,
+ mdct_long_end, g->switch_point,
+ g->block_type);
+
+ buf = mdct_buf + 4*18*(mdct_long_end >> 2) + (mdct_long_end & 3);
+ ptr = g->sb_hybrid + 18 * mdct_long_end;
+
for (j = mdct_long_end; j < sblimit; j++) {
/* select frequency inversion */
- win = mdct_win[2] + ((4 * 36) & -(j & 1));
+ win = RENAME(ff_mdct_win)[2 + (4 & -(j & 1))];
out_ptr = sb_samples + j;
for (i = 0; i < 6; i++) {
- *out_ptr = buf[i];
+ *out_ptr = buf[4*i];
out_ptr += SBLIMIT;
}
imdct12(out2, ptr + 0);
for (i = 0; i < 6; i++) {
- *out_ptr = MULH3(out2[i ], win[i ], 1) + buf[i + 6*1];
- buf[i + 6*2] = MULH3(out2[i + 6], win[i + 6], 1);
+ *out_ptr = MULH3(out2[i ], win[i ], 1) + buf[4*(i + 6*1)];
+ buf[4*(i + 6*2)] = MULH3(out2[i + 6], win[i + 6], 1);
out_ptr += SBLIMIT;
}
imdct12(out2, ptr + 1);
for (i = 0; i < 6; i++) {
- *out_ptr = MULH3(out2[i ], win[i ], 1) + buf[i + 6*2];
- buf[i + 6*0] = MULH3(out2[i + 6], win[i + 6], 1);
+ *out_ptr = MULH3(out2[i ], win[i ], 1) + buf[4*(i + 6*2)];
+ buf[4*(i + 6*0)] = MULH3(out2[i + 6], win[i + 6], 1);
out_ptr += SBLIMIT;
}
imdct12(out2, ptr + 2);
for (i = 0; i < 6; i++) {
- buf[i + 6*0] = MULH3(out2[i ], win[i ], 1) + buf[i + 6*0];
- buf[i + 6*1] = MULH3(out2[i + 6], win[i + 6], 1);
- buf[i + 6*2] = 0;
+ buf[4*(i + 6*0)] = MULH3(out2[i ], win[i ], 1) + buf[4*(i + 6*0)];
+ buf[4*(i + 6*1)] = MULH3(out2[i + 6], win[i + 6], 1);
+ buf[4*(i + 6*2)] = 0;
}
ptr += 18;
- buf += 18;
+ buf += (j&3) != 3 ? 1 : (4*18-3);
}
/* zero bands */
for (j = sblimit; j < SBLIMIT; j++) {
/* overlap */
out_ptr = sb_samples + j;
for (i = 0; i < 18; i++) {
- *out_ptr = buf[i];
- buf[i] = 0;
+ *out_ptr = buf[4*i];
+ buf[4*i] = 0;
out_ptr += SBLIMIT;
}
- buf += 18;
+ buf += (j&3) != 3 ? 1 : (4*18-3);
}
}
}
if (!s->adu_mode) {
+ int skip;
const uint8_t *ptr = s->gb.buffer + (get_bits_count(&s->gb)>>3);
assert((get_bits_count(&s->gb) & 7) == 0);
/* now we get bits from the main_data_begin offset */
#if !UNCHECKED_BITSTREAM_READER
s->gb.size_in_bits_plus8 += EXTRABYTES * 8;
#endif
- skip_bits_long(&s->gb, 8*(s->last_buf_size - main_data_begin));
+ s->last_buf_size <<= 3;
+ for (gr = 0; gr < nb_granules && (s->last_buf_size >> 3) < main_data_begin; gr++) {
+ for (ch = 0; ch < s->nb_channels; ch++) {
+ g = &s->granules[ch][gr];
+ s->last_buf_size += g->part2_3_length;
+ memset(g->sb_hybrid, 0, sizeof(g->sb_hybrid));
+ }
+ }
+ skip = s->last_buf_size - 8 * main_data_begin;
+ if (skip >= s->gb.size_in_bits && s->in_gb.buffer) {
+ skip_bits_long(&s->in_gb, skip - s->gb.size_in_bits);
+ s->gb = s->in_gb;
+ s->in_gb.buffer = NULL;
+ } else {
+ skip_bits_long(&s->gb, skip);
+ }
+ } else {
+ gr = 0;
}
- for (gr = 0; gr < nb_granules; gr++) {
+ for (; gr < nb_granules; gr++) {
for (ch = 0; ch < s->nb_channels; ch++) {
g = &s->granules[ch][gr];
- if (get_bits_count(&s->gb) < 0) {
- av_log(s->avctx, AV_LOG_DEBUG, "mdb:%d, lastbuf:%d skipping granule %d\n",
- main_data_begin, s->last_buf_size, gr);
- skip_bits_long(&s->gb, g->part2_3_length);
- memset(g->sb_hybrid, 0, sizeof(g->sb_hybrid));
- if (get_bits_count(&s->gb) >= s->gb.size_in_bits && s->in_gb.buffer) {
- skip_bits_long(&s->in_gb, get_bits_count(&s->gb) - s->gb.size_in_bits);
- s->gb = s->in_gb;
- s->in_gb.buffer = NULL;
- }
- continue;
- }
-
bits_pos = get_bits_count(&s->gb);
if (!s->lsf) {
projects / ffmpeg / blobdiff